[Q] Sound Problem After KitKat Upgrade

Hi, I recently Upgraded to kItkat & and now i notice that When i play a Video, sound is routed from Earpiece not from loudspeaker. When i restart & play the video again it is played on Loudspeaker. Same thing is also happening when i receive a Call. Ringtone is being played from earpiece not on the speaker, so its very hard to hear. Any Solution ??

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